MODIS/Terra Vegetation Indices Daily Rolling-8-Day L3 Global 250m SIN Grid NRT

The MODIS/Terra Vegetation Indices Daily Rolling-8-Day L3 Global 250m SIN Grid Near Real Time (NRT) data, MOD13Q4N, are provided everyday at 250-meter spatial resolution as a gridded leve-3 product in the Sinusoidal projection. Vegetation indices are used for global monitoring of vegetation conditions and are used in products displaying land cover and land cover changes. These data may be used as input for modeling global biogeochemical and hydrologic processes and global and regional climate. These data also may be used for characterizing land surface biophysical properties and processes including primary production and land cover conversion.

Note: This is a near real-time product only. Standard historical data and imagery for MOD13Q4N (250m) and MOD13A4N (500m) are not available. Users can either use the NDVI standard products from LAADS web (https://ladsweb.modaps.eosdis.nasa.gov/search/) or access the science quality MxD09[A1/Q1] data and create the NDVI product of their own.

MODIS/Terra植被指数每日滚动8日L3全球250米SIN网格近实时（NRT）数据，MOD13Q4N，以每日提供，其空间分辨率为250米，并以SIN投影下的网格化L3产品形式呈现。植被指数用于全球植被状况的监测，并应用于展示地表覆盖及其变化的产品中。这些数据可用于模拟全球生物地球化学和水利过程，以及全球和区域气候。此外，这些数据亦可用于描述地表生物物理属性和过程，包括初级生产和地表覆盖转换。注：此为仅提供近实时产品。MOD13Q4N（250米）和MOD13A4N（500米）的标准历史数据和图像不可用。用户可使用来自LAADS网页（https://ladsweb.modaps.eosdis.nasa.gov/search/）的NDVI标准产品，或访问科学质量的MxD09[A1/Q1]数据，自行创建NDVI产品。